Sewage Tank Cleaning

Marske Sewage Treatment Works: sewage overflow history (NWL00856)

Review available Environment Agency annual monitoring returns for Marske Sewage Treatment Works. Compare reported spill counts, total duration and monitor operation by year, with source details and gaps in the series identified.

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Annual monitoring returns

2020

2021

2022

136

2023

107

2024

2025

Year	Counted spills	Total spill duration (hours)	Monitor operation (%)
2025	75	531.15	99.86
2024	107	784.13	100
2023	136	807.72	100
2022	84	303.41	100
2021	96	634.21	100
2020	4	15.77	100

Published record details

Reference: NWL00856
Location: Tees Coastal
Coordinates: 54.60891, -1.00988
Watercourse: North Sea
Sewerage company: Northumbrian Water
Asset type: Inlet SO at WwTW
Permit reference: 25/06/1015
Discharge grid reference: NZ6405024200
Reporting years: 2025, 2024, 2023, 2022, 2021, 2020
Catchment: Tees Coastal

Location

Marske Sewage Treatment Works
54.60891, -1.00988

Understanding annual storm overflow figures

The Environment Agency's annual returns report storm overflow monitoring information supplied by water companies. Spill counts use the regulatory 12/24-hour block method, so a counted spill is not necessarily a single uninterrupted discharge. Duration is the reported total time in spill, rather than the volume of sewage discharged. Monitor operation indicates the percentage of the reporting period for which the monitor operated. Missing values, incomplete monitoring and changes in recorded outlet details can affect comparisons between years. These annual figures describe historical reporting periods, not live discharge conditions or the cause of sewage problems at an individual property.

Nearby records

Marske Sewage Treatment Works0 km The Stray Storm Retention Tank1.3 km Howle Beck Overflows (Marske Cemete1.5 km Bydale School CSO1.8 km Dale Street CSO1.8 km

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